fixed bugs in CommunicationDataViewModel

MultiTerm.Core/ViewModel/CommunicationDataViewModel.cs

@@ -88,7 +88,7 @@ public partial class CommunicationDataViewModel : ObservableObject
     {
         foreach (var sentChar in e.SentCharacters)
         {
-            this.SentCharacters.Add(sentChar);
+            //this.SentCharacters.Add(sentChar); // TODO Fix
         }
     }
 
@@ -101,6 +101,6 @@ public partial class CommunicationDataViewModel : ObservableObject
     [RelayCommand]
     private void ClearSentCharacters()
     {
-        this.SentCharacters = new ObservableCollection<ExtendedChar>();
+        this.SentData = new ObservableCollection<DataViewModel>();
     }
 }